| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 7 |
17.9%
|
| 2 | 1 year to less than 2 years | 12 |
30.8%
|
| 3 | 2 years to less than 5 years | 12 |
30.8%
|
| 4 | 5 years or more | 8 |
20.5%
|
| Sysmiss | 4505 |